CONTROLLING ANAEROBIC TREATMENT PROCESS

CONTROLLING ANAEROBIC TREATMENT PROCESS

The invention relates to a method of controlling a hydrolysis step at an anaerobic treatment process for treating wastewater from the manufacture of peroxide bleached mechanical or chemi-mechanical pulp. The method is carried out in that the redox potential of outgoing water from the hydrolysis step...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: BENGT GORAN HANSSON, THOMAS GUNNAR WELANDER, PER-ERIK ANDERSSON, GORAN ERIK ANNERGREN, NILS LUDVIG MOLIN
Format: Patent
Sprache:eng
Schlagworte:
APPARATUS THEREFOR
CHEMISTRY
METALLURGY
PAPER-MAKING
PRODUCTION OF CELLULOSE
PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCESFROM CELLULOSE-CONTAINING MATERIALS
REGENERATION OF PULPING LIQUORS
TEXTILES
TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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Beschreibung
Zusammenfassung:The invention relates to a method of controlling a hydrolysis step at an anaerobic treatment process for treating wastewater from the manufacture of peroxide bleached mechanical or chemi-mechanical pulp. The method is carried out in that the redox potential of outgoing water from the hydrolysis step continuously is measured and controlled in that ingoing water to the hydrolysis step at demand is directed past the hydrolysis step and to a subsequent aerobic step.